Norman Osborn has captured Captain America, and unless the New Avengers surrender Sharon Carter, he's going to execute him. He freed the Black Widow to deliver his ultimatum, and despite the assurance of the Avengers, Sharon can't have the blood of another Captain America on her hands.

While the Falcon works to free Captain America from the Thunderbolts, Sharon leaves to turn herself in to H.A.M.M.E.R. without suspecting that Osborn is willing to work with the Red Skull in order to have Captain America on his side.